Steam-turbine.



PATENTED MAR. 27, 1906.

D. LUMGAIR.

STEAM TURBINE.

APPLIGATION FILED SEPT. 21, 1905.

FIG. 5

8 l'fontm;

UNITED STATES PATENT OFFICE.

DAVID LUMGAIR, OF WEST BAY CITY, MICHIGAN, ASSIGNOR OF ONE-HALF TO JACOBP. BENDER, OF BAY CITY, MICHIGAN.

STEAM-TURBINE.

Specification of Letters Patent.

Patented March 27, 1906.

Application filed September 21,1905. Serial No. 279,418.

To all whom it may concern.-

Be it known that I, DAVID LUMGAIR, a citizen of the United States,residing at West Bay City, in the county of Bay and State of Michigan,have invented certain new and useful Improvements in Steam-Turbines andI do declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to steam-turbines; and one of the principalobjects of the same is to provide a rotary engine of this type whichshall be simple in construction and efficient in operation and whichwill utilize the steam primarily by impact and secondarily by expansionand in this way utilizing the entire force of the steam.

Another object is to provide a compound steam-turbine of simpleconstruction with a series of bucketed wheels of different sizes and toadmit the steam progressively from one end to the other of the series tosecure both the impact and expansive forces of said steam.

These and other objects are attained by means of the constructionillustrated in the accompanying drawings, in which Figure 1 is ahorizontal longitudinal section of a steam-turbine made in accordancewith my invention. Fig. 2 is a vertical sectional view on the line 2 2of Fig. 1, and Fig. 3 is a similar view on the line 3 3 of Fig. 1.

Referring to the drawings for a more particular description of myinvention, the numeral 1 designates the cylinder or casing, which ispreferably and as showncomposed of a series of sections bolted togetherat suitable intervals by means of flanges 2, bolts 3, intermediate rings4, and integral internal flanges 5, as shown in Fig. 1. This cylinder orcasing is closed at its opposite ends by vmeans of the cylinder-heads 6,and a shaft 7 passes through these heads, which are provided withsuitable stuffing-boxes 8. In one of the cylinder-heads is aninlet-opening 9 to receive live steam from any suitable source. \Vithinthe casing and mounted to rotate on the shaft 7 are a series ofturbine-wheels 15, provided with curved buckets 11. Openings 12 near theaxis of the wheel communicate with the buckets 11 through the curvedopening 18, Fig. 2. These turbine-wheels consist of disks 15, secured toa hub mounted to rotate upon the shaft 7. Between the hubs of rings 4between the sections of the casing, as.

shown. These guides, in connection with the hubs 13, serve to preventthe wheels from moving longitudinally upon the shaft and to insure asmooth regular action of the wheels. The spokes or webs are bolted tothe buckets, as shown. A series of larger turbinewheels 9 to receive theexpanded steam are arranged in the larger portion of the casing andmounted upon the shaft 7 in a manner similar to the wheels 10. Guides 16are also secured in a manner similar to those already described. Asshown in Fig. 2, these larger turbine-wheels are provided with a seriesof buckets 17 and curved openings 18, which lead to the buckets. Anexhaustport 19 is provided in the casing 1 at the end opposite theinlet-port. The casing is adapted to rest upon legs a of any suitableconstruction. Upon reference to Fig. 1 it will be understood that thesteam enters the inlet-port 9 and passes through opening b and into oneof the turbine-wheels 10 through the curved openings, where the steamacts by impact upon the blades or buckets 11 thereof, passing radiallyout through the wheel and around and down through the opening 0 into thenext adjoining turbine, and thence continues radially upward and outwardto the next wheel, and so on through the series, gradually expanding andexerting its force upon the wheels near the exhaust end by expansion,and finally passing out through the exhaust-opening, where it may betaken and passed to another series of wheels or to the atmosphere, ifdesired.

Various changes in the form, proportion, and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of the invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. A steam-turbine comprising a casing made in sections having externaland internal flanges, said sections being bolted together and havingrings secured between the external section-flanges and extending intothe easing, a series of guides secured to said internal. flanges andrings and provided with openings, a series of turbine-wheels mountedupon a shaft Within. said casing, buckets on said Wheels, an inlet-portat one end of said casing, and an eXl'iaust-port at the opposite end,substantially as described.

2. In a compound steam-turbine consisting of sections having internaland external flanges, guides secured to the internal flanges, ringssecured to the external flanges and. guides secured thereto, a shaftextending through said casing, a series of impact turbine-wheels mountedupon said shaft Within said casing, a series of larger stea1n-turbineWheels secured to said shaft Within said casing, a liVe-stea1ninlet pipeat one end of said casing, and an exhaust-port at the opposite endthereof, substantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing Witnesses.

DAVID LUMGAIR. Witnesses FRED NEUMANN, TnoMAs D. CAMPBELL.

